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authorMartin K. Petersen <martin.petersen@oracle.com>2021-06-09 06:39:15 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2021-07-21 05:08:55 +0300
commit7ba46799d34695534666a3f71a2be10ea85ece6c (patch)
tree02ff462025963230e3d890b873b58b692a353be7 /include/scsi
parentf339c7e491a8150d416d4aa657fe379c20fe6b79 (diff)
downloadlinux-7ba46799d34695534666a3f71a2be10ea85ece6c.tar.xz
scsi: core: Add scsi_prot_ref_tag() helper
We are about to remove the request pointer from struct scsi_cmnd and that will complicate getting to the ref_tag via t10_pi_ref_tag() in the various drivers. Introduce a helper function to retrieve the reference tag so drivers will not have to worry about the details. Link: https://lore.kernel.org/r/20210609033929.3815-2-martin.petersen@oracle.com Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Message-Id: <20210609033929.3815-2-martin.petersen@oracle.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/scsi_cmnd.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 779a59fe8676..301b9cd4ddd0 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -287,6 +287,13 @@ static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
return blk_rq_pos(scmd->request);
}
+static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
+{
+ struct request *rq = blk_mq_rq_from_pdu(scmd);
+
+ return t10_pi_ref_tag(rq);
+}
+
static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
{
return scmd->device->sector_size;